* {
	box-sizing: border-box;
	margin: 0;
}
 html, body, div, ul, li, h1, h2, h3, h4, h5, h6, p {
	margin: 0;
	padding: 0;
}
ul, li {
	list-style: none;
}
a {
	text-decoration: none;
}
.cover {
	height: 100%;
	width: 100%;
}
.active {
	display: inline;
}